The first app that stops annoying phone calls in iOS, with the world’s biggest directory of telemarketers – 3,000,000+ from 100+ countries!

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You probably love your smartphone – except for maybe the phone part and, in particular, the telemarketers often on the other end of the line. Telemarketers make 148 million annoying, time-wasting calls per day1 and do-not-call lists (where available) do not work2, 3 (and weren’t even meant to for many types of telemarketers4). Callblock is the first iOS app that helps prevent these calls.5

Based on our benchmarking, the app identifies 86.7 percent of telemarketing calls correctly with only 1.7 percent false positives on average.6

Callblock is something of a sequel to our ad blocker, Adblock Fast, which has 750,000 users and is rated 4.5 and 4 stars in the App Store and Google Play since launching alongside iOS 9 then the Samsung Galaxy S6. We’ve built on our experience filtering online advertisers to compile, classify, and apply what we think is the world’s biggest directory of telemarketers, featuring millions of entries from almost every country in the world.

Questions, possibly to be asked frequently

Who makes Callblock?

What are Unclassified callers in Callblock?

Unclassified callers are those we’ve identified as telemarketers but not yet which type.

Which countries does Callblock work in?

Callblock can screen telephone calls from almost every country in the world – 174 of the 193 recognized by the United Nations and so many that naming which countries are not supported is a whole lot easier. They are:

Antigua and Barbuda
The Bahamas
Barbados
Dominica
The Dominican Republic
East Timor
Grenada

Where does Callblock list blocked calls?

Callblock can’t monitor your incoming calls (to list or do otherwise with them) due to iOS’s privacy model. Blocked calls are sent straight to voicemail. You may want to set the app to caller-ID only till you’re comfortable the right callers are being screened out.

When will Callblock be available on [insert platform here]?

Why is a subscription required if Callblock was purchased?

You don’t need a subscription if you bought the first version of Callblock, but later versions can’t determine whether you bought the first version if you’ve since deleted the app. Forward your App Store receipt to help@callblockapp.com, though, and we can credit you with a subscription.

How is Callblock’s directory of telemarketers compiled?

Callblock’s directory comes from public and private records, the results of our ongoing research and testing, and user reports. Over 10,000 new entries on average are added to the directory and existing entries, reclassified daily. The app autoupdates to include these changes.

Does Callblock require Contacts access?

Can a missing or misclassified caller be added or removed?

To add or remove a missing or misclassified caller to or from Callblock’s (local) directory (and to report the caller for review to help improve the distributed directory), tap the Add caller button, enter the caller’s telephone number, and choose which type the caller is or the Not a telemarketer option if the caller isn’t a telemarketer.